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Autor Santamaría Sánchez-Barriga, Jacobo |
Documentos disponibles escritos por este autor (91)
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Schmidt, Rainer ; Ventura, Jofre ; Langenberg, Eric ; Nemes, Norbert Marcel ; Munuera, Carmen ; Varela, Manuel ; García-Hernández, Mar ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2012-07The detection of true magnetocapacitance (MC) as a manifestation of magnetoelectric coupling (MEC) in multiferroic materials is a nontrivial task, because pure magnetoresistance (MR) of an extrinsic Maxwell-Wagner-type dielectric relaxation can [...]![]()
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Lucía Mulas, María Luisa ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo ; Sefrioui, Zouhair ; Varela del Arco, María ; Arias Serna, Diego ; Loos, G. ; Navacerrada, M.A. | American Institute of Physics | 1998-12-07We have studied the effect of He+ irradiation on the electrical resistivity and Curie temperature of ferromagnetic SrRuO3 thin films. An evolution from metallic to insulating behavior is observed when He+ ion fluence is increased, suggesting a m[...]![]()
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Cabero Piris, M. ; Nagy, K. ; Gallego, F. ; Sander, A. ; Rio, M. ; Cuellar, F.A. ; Tornos, J. ; Hernández Martín, David ; Nemes, Norbert Marcel ; Mompean, F. ; Gárcia Hernández, M. ; Rivera Calzada, Alberto Carlos ; Sefrioui, Zouhair ; Reyren, N. ; Feher, T. ; Varela del Arco, María ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2017-09Controlling magnetic anisotropy is an important objective towards engineering novel magnetic device concepts in oxide electronics. In thin film manganites, magnetic anisotropy is weak and it is primarily determined by the substrate, through indu[...]![]()
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Moreno, K. J. ; Mendoza-Suárez, G. ; Fuentes, A. F. ; Garcia Barriocanal, Javier ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | Sociedad Española de Cerámica y Vidrio | 2004-07Presentamos un estudio de la conductividad iónica en las series Y_(2)Ti_(2-y)Zr_(y)O_(7) y Gd_(2)Ti_(2-y)Zr_(y)O_(7) (0?y?2) obtenidas por síntesis mecanoquímica. Se presenta un estudio de la dinámica de iones oxígeno en estos materiales mediant[...]![]()
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León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; París, M. A. ; Sanz, J. ; Ibarra, J. ; Torres, L. M. | American Physical Society | 1997-09-01Nuclear magnetic resonance and electrical conductivity measurements are conducted to study the dynamics of the ionic diffusion process in the crystalline ionic conductor Li_(0.05)La_(0.5)TiO_(3). dc conductivity shows a nonArrhenius temperature [...]![]()
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Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Hernández Rojas, J.L. ; Lucía Mulas, María Luisa ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo | The Optical Society Of America | 1992-04-01The refractive index n and the absorption coefficient-alpha of radio frequency sputtered CuGaSe2 and CuInSe2 thin films were obtained by means of transmissivity (T) and reflectivity (R) measurements at normal incidence. The optical properties we[...]![]()
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Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Hernández Rojas, J. L. ; Lucía Mulas, María Luisa ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo | Amer Inst Physics | 1992-07-13An optical spectroscopic study of the plasma produced during rf sputtering of an YBa2Cu3O7-x target was performed to analyze two basic properties of the deposition process: resputtering effects and oxidation mechanisms. Strong emissions of all t[...]![]()
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León Yebra, Carlos ; Rivera Calzada, Alberto Carlos ; Várez, A. ; Sanz, J. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2001-02-12We have analyzed the constant loss contribution to the ac conductivity in the frequency range 10 Hz–1 MHz and temperatures down to 8 K, for two Li ionic conductors, one crystalline (Li_(0.18)La_(0.61)TiO_(3)) and the other glassy (61SiO_(2) . 35[...]![]()
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Nemes, Norbert Marcel ; Gárcia Hernández, M. ; te Velthuis, S. G. E. ; Hoffmann, A. ; Visani, C. ; Garcia Barriocanal, Javier ; Peña, V. ; Arias Serna, Diego ; Sefrioui, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2008-09We studied ferromagnet/superconductor/ferromagnet trilayers based on La_(0.7)Ca_(0.3)MnO_(3) manganite and YBa_(2)Cu_(3)O_(7??) (YBCO) high-T_(c) cuprate with magnetoresistance and magnetization measurements. We find an inverse superconducting s[...]![]()
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Arias Serna, Diego ; Sefrioui, Zouhair ; Loos, G. ; Agulló-Rueda, F. ; Garcia Barriocanal, Javier ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2003-09-01We report on the effect of oxygen disorder in the CuO chains on the superconducting properties of oxygen depleted YBa_(2)Cu_(3)O_(x)(YBCO). While moderate disorder, induced thermally, depresses the critical temperature as a result of a reduced c[...]![]()
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López de la Torre, M. A. ; Peña, V. ; Sefrioui, Zouhair ; Arias Serna, Diego ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Martínez, J. L. | American Physical Society | 2006-02-14We report the observation of a paramagnetic contribution to the field cooled magnetization that develops below the superconducting transition temperature T_(c) in measurements performed on YBa_(2)Cu_(3)O_(7)/La_(0.7)Ca_(0.3)MnO_(3) superlattices[...]![]()
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Frechero, M. A. ; Rocci, Mirko ; Sánchez Santolino, Gabriel ; Salafranca, Juan ; Schmidt, Rainer ; Díaz Guillén, M. R. ; Durá, O. J. ; Rivera Calzada, Alberto Carlos ; Varela del Arco, María ; Santamaría Sánchez-Barriga, Jacobo ; León Yebra, Carlos | Nature Publishing Group | 2015-12-17The blocking of ion transport at interfaces strongly limits the performance of electrochemical nanodevices for energy applications. The barrier is believed to arise from space-charge regions generated by mobile ions by analogy to semiconductor j[...]![]()
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Alberca, A. ; Munuera, C. ; Azpeitia, J. ; Kirby, B. ; Nemes, Norbert Marcel ; Pérez Muñoz, Ana Mª ; Tornos, J. ; Mompean, F. J. ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Gárcia Hernández, M. | Nature Publishing Group | 2015-12-09We study the origin ofthe magnetoelectric coupling in manganite films on ferroelectric substrates. We find large magnetoelectric coupling in La_(0.7)Ca_(0.3)MnO_(3)/BaTiO_(3) ultra thin films in experiments based on the converse magnetoelectric [...]![]()
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Niu, Yue ; Frisenda, Riccardo ; Svatek, Simon A. ; Orfila, Gloria ; Gallego, Fernando ; Gant, Patricia ; Agrait, Nicolás ; León Yebra, Carlos ; Rivera Calzada, Alberto Carlos ; Pérez de Lara, David ; Santamaría Sánchez-Barriga, Jacobo ; Castellanos Gómez, Andrés | IOP Publishing Ltd. | 2017-09The fabrication of artificial materials by stacking of individual two-dimensional (2D) materials is amongst one of the most promising research avenues in the field of 2D materials. Moreover, this strategy to fabricate new man-made materials can [...]![]()
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Grandal, Javier ; León Yebra, Carlos ; Varela del Arco, María ; Santamaría Sánchez-Barriga, Jacobo ; Rouco, V. ; El Hage, R. ; Sander, A. ; Seurre, K. ; Palermo, X. ; Briatico, J. | Nature Publishing Group | 2020-01-31The term tunnel electroresistance (TER) denotes a fast, non-volatile, reversible resistance switching triggered by voltage pulses in ferroelectric tunnel junctions. It is explained by subtle mechanisms connected to the voltage-induced reversal o[...]![]()
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Rocci, Mirko ; Tornos Castillo, Javier ; Rivera Calzada, Alberto Carlos ; Sefrioui, Zouhair ; Clement, Marta ; Iborra, Enrique ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2014-03-10We report on the fabrication and magnetotransport characterization of hybrid graphene-based nanodevices with epitaxial nanopatterned La_(0.7)Sr_(0.3)MnO_(3) manganite electrodes grown on SrTiO_(3)(100). The few-layer graphene was deposited onto [...]![]()
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Nemes, Norbert Marcel ; Sánchez Santolino, G. ; Varela del Arco, María ; Sefrioui, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | Nature Publishers Group | 2014-06-23Electric-field control of magnetism has remained a major challenge which would greatly impact data storage technology. Although progress in this direction has been recently achieved, reversible magnetization switching by an electric field requir[...]![]()
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Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo ; Iborra, E. | American Institute of Physics | 1989-04-15All?sputtered CuInSe2/CdS solar cellheterojunctions have been analyzed by means of capacitance?frequency (C?F) and capacitance?bias voltage (C?V) measurements. Depending on the CuInSe2 layer composition, two kinds of heterojunctions were analyze[...]![]()
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Pennycook, T. J. ; Oxley, M. P. ; Garcia Barriocanal, Javier ; Bruno, F. Y. ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Pantelides, S. T. ; Varela del Arco, María ; Pennycook, S. J. | E D P Sciences | 2011-06Colossal ionic conductivity was recently discovered in YSZ/SrTiO_(3) multilayers and was explained in terms of strain- and interface-enhanced disorder of the O sublattice. In the present paper we use a combination of scanning transmission electr[...]![]()
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Nemes, Norbert Marcel ; Calderón, M. J. ; Beltrán Jiménez, José ; Bruno, F. Y. ; Garcia Barriocanal, Javier ; Sefrioui, Zouhair ; León Yebra, Carlos ; Gárcia Hernández, M. ; Muñoz, M. C. ; Brey, L. ; Santamaría Sánchez-Barriga, Jacobo | Wiley-V C H Verlag Gmbh | 2014-11-26The magnetoresistance of La0.7Sr0.3MnO3/SrTiO3La0.7Sr0.3MnO3/SrTiO3 superlattices with magnetic field rotating out-of-plane shows unexpected peaks for in-plane fields. Resistivity calculations with spin–orbit coupling reveal that orbital reconst[...]![]()
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Pérez Estébanez, Marta ; Rivera Calzada, Alberto Carlos ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Isasi Marín, Josefa | Sociedad Española de Cerámica y Vidrio | 2010-01Haciendo uso de la química sol-gel, se han preparado ortofosfatos de composición LiTi_(2)(PO_(4))_(3) y Li_(1.05)(Cr/Fe)_(0.05)Ti_(1.95)(PO_(4))_(3) a temperaturas moderadas mediante el método Pechini. Estas fases han sido caracterizadas estruct[...]![]()
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Nemes, Norbert Marcel ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Tornos Castillo, Javier ; Cuéllar Jiménez, Fabián Andrés ; Beltrán Finez, Juan Ignacio ; Biskup Zaja, Nevenko ; Schmidt, Rainer ; Durán Montejano, Luis ; Ayargüena Porras, Blanca ; Ábalos Álvarez, Marta ; Rodríguez Pérez, Oscar ; Javierre Aso, Ramón ; Hernández Maldonado, David | 2020-04-24El Objetivo General del Proyecto de Innovación “SmartFis” se centraba en facilitar el aprendizaje de los contenidos propios de las múltiples asignaturas impartidas en el Laboratorio de Física General de la Facultad de Ciencias Físicas, en varias[...]![]()
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Garcia Barriocanal, Javier ; Cezar, J. C. ; Bruno, Flavio Yair ; Thakur, P ; Brookes, N. B. ; Utfeld, C. ; Rivera Calzada, Alberto Carlos ; Giblin, S. R. ; Taylor, S. W. ; Duffy, J. A. ; Dugdale, S. B. ; Nakamura, T. ; Kodama, K. ; León Yebra, Carlos ; Okamoto, S. ; Santamaría Sánchez-Barriga, Jacobo | Nature Publishing Group | 2010-09In systems with strong electron-lattice coupling, such as manganites, orbital degeneracy is lifted, causing a null expectation value of the orbital magnetic moment. Magnetic structure is thus determined by spin–spin superexchange. In titanates, [...]![]()
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Visani, C. ; Peña, V. ; Garcia Barriocanal, Javier ; Arias Serna, Diego ; Sefrioui, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Nemes, Norbert Marcel ; Gárcia Hernández, M. ; Martínez, J. L. ; te Velthuis, S. G. E. ; Hoffmann, A. | American Physical Society | 2007-02We report on large magnetoresistance in ferromagnet/superconductor/ferromagnet trilayer structures made of La_(0.7)Ca_(0.3)MnO_(3) and YBa_(2)Cu_(3)O_(7). We find that the shape and height of the magnetoresistance peaks are not modified when the[...]![]()
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Peña, V. ; Visani, C. ; Garcia Barriocanal, Javier ; Arias Serna, Diego ; Sefrioui, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Almasán, Carmen A. | American Physical Society | 2006-03-27We report on the interplay between magnetism and superconductivity in La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7) structures. We have grown heterostructures (bilayers and trilayers) with a constant thickness of the ferromagnetic layer of 40 unit [...]![]()
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Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Hernández Rojas, J.L. ; Lucía Mulas, María Luisa ; Santamaría Sánchez-Barriga, Jacobo ; Sánchez Quesada, Francisco | American Institute of Physics | 1994-03-07Films of CuGaxIn(1-x)Se2 (CGIS) have been grown by rf sputtering from stoichiometric single targets with different Ga/In ratios. Adjusting growth temperature and argon pressure we are able to deposit films with a wide range of Cu contents: From [...]![]()
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Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 1990-06-01Thin films of CuGaSe2 have been produced by rf sputtering. Compositional, structural, electrical, and optical properties are strongly influenced by growthtemperature. At substrate temperatures lower than 300?°C amorphous or poorly crystalline Se[...]![]()
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Nemes, Norbert Marcel ; Rocci, Mirko ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2011-08-23We have analyzed the interface structure and composition of La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7)/La_(0.7)Ca_(0.3)MnO_(3) trilayers by combined polarized neutron reflectometry, aberration-corrected microscopy, and atomic column resolution e[...]![]()
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Díaz Guillén, J. A. ; Díaz Guillén, M. R. ; Padmasree, K. P. ; Almanza, J. M. ; Fuentes, A. F. ; Santamaría Sánchez-Barriga, Jacobo ; León Yebra, Carlos | Sociedad Española de Cerámica y Vidrio | 2008-05Different compositions in the pyrochlore-type Gd_(2-y)La_(y)Zr_(2)O_(7) solid solution (0 ? y ? 1) were prepared at room-temperature by mechanically milling stoichiometric mixtures of the corresponding oxides. Irrespective of their lanthanum con[...]![]()
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Rivera Calzada, Alberto Carlos ; Santamaría Sánchez-Barriga, Jacobo ; León Yebra, Carlos ; Blochowicz, T. ; Gainaru, C. ; Rössler, E. A. | Amer Inst Physics | 2003-04-14We report on the temperature dependence of the ionic conductivity at low temperatures in the crystalline lithium ionic conductor Li_(0.18)La_(0.61)TiO_(3). Time domain measurements of the electric modulus have been performed to investigate ion d[...]![]()
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Cuéllar Jiménez, Fabián Andrés ; Sánchez Santolino, Gabriel ; Varela del Arco, María ; Clement, M. ; Iborra, E. ; Sefrioui, Zouhair ; Santamaría Sánchez-Barriga, Jacobo ; León Yebra, Carlos | American Physical Society | 2012-06-20We report on the electrical transport properties of all-oxide La_(0.7)Ca_(0.3)MnO_(3)/SrTiO_(3):Nb heterojunctions with lateral size of just a few micrometers. The use of lithography techniques to pattern manganite pillars ensures perpendicular [...]![]()
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Nemes, Norbert Marcel ; García Hernandez, Mar ; Szatmári, Zsolt ; Fehér, Titusz ; Simon, Ferenc ; Visani, Cristina ; Peña, Vanessa ; Miller, Christian ; Garcia Barriocanal, Javier ; Bruno, Flavio Yair ; Sefrioui, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | IEEE-Institute of Electrical and Electronics Engineers | 2009-11The magnetic properties of La_0.7Ca_0.3Mn_O3 (LCMO) manganite thin films were studied with magnetometry and ferromagnetic resonance as a function of film thickness. They maintain the colossal magnetoresistance behavior with a pronounced metal-in[...]![]()
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Sefrioui, Zouhair ; Cros, V. ; Barthélémy, A. ; Peña, V. ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Varela del Arco, María ; Pennycook, S.J. | American Institute of Physics | 2006-06-09We report large tunneling magnetoresistance in La_(0.7)Ca_(0.3)MnO_(3) (8 nm)/PrBa_(2)Cu_(3)O_(7) (2.4 nm)/La_(0.7)Ca_(0.3)MnO_(3) (50 nm) junctions. The coherent growth of the cuprate on the manganite allows the deposition of ultrathin barriers[...]![]()
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León Yebra, Carlos ; Lucía Mulas, María Luisa ; Santamaría Sánchez-Barriga, Jacobo ; Sánchez Quesada, Francisco | American Physical Society | 1998-01-01We present complex admittance measurements on single-crystal yttria-stabilized zirconia and polycrystalline Li_(0.5)La_(0.5)TiO_(3) over the frequency range 5 Hz to 30 MHz and at temperatures ranging between 150 and 650 K. Electric-field relaxat[...]![]()
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León Yebra, Carlos ; Martín, J. M. ; Santamaría Sánchez-Barriga, Jacobo ; Skarp, J. ; González Díaz, Germán ; Sánchez Quesada, Francisco | American Institute of Physics | 1996-05-15The use of Kramers–Kronig transforms is proposed for the treatment of admittance spectroscopy data of junctions when significant shunt conductance or series resistance is present. An algorithm has been implemented to calculate the transformation[...]![]()
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Sefrioui, Zouhair ; Arias Serna, Diego ; González Herrera, Elvira María ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Vicent López, José Luis | American Physical Society | 2001-01-18Epitaxial YBa_(2)Cu_(3)O_(7) thin films, grown by high-pressure dc sputtering, are irradiated with He^(+) ions at 80 keV with doses between 10^(14) and 10^(15) cm^(-2). Irradiation reduces the critical temperature but it does not modify the carr[...]![]()
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Sefrioui, Zouhair ; Arias, D. ; González Herrera, Elvira María ; León, C. ; Santamaría Sánchez-Barriga, Jacobo ; Vicent López, José Luis | American Physical Society | 2001-02-01Epitaxial YBa_2Cu_3O_7 thin films, grown by high-pressure de sputtering, an irradiated with He^(+) ions at 80 keV with doses between 10_(14) and 10_(15) cm^(-2). Irradiation reduces the critical temperature but it does not modify the carrier con[...]![]()
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Villegas, J. E. ; González Herrera, Elvira María ; Sefrioui, Z. ; Santamaría Sánchez-Barriga, Jacobo ; Vicent López, José Luis | American Physical Society | 2005-11Magnetotransport properties have been used to investigate vortex phases in Nb films with periodic arrays of magnetic pinning centers. This kind of samples show a continuous glass transition similar to that observed in Nb plain films, but the per[...]![]()
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Scigaj, M. ; Dix, N. ; Cabero Piris, Mariona ; Rivera Calzada, Alberto Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Fontcuberta, J. | Amer Inst Physics | 2014-06-23We show that yttria-stabilized zirconia (YSZ) films deposited on structurally dissimilar SrTiO_(3)(110) substrates exhibit two-dimensional layer-by-layer growth. We observed that, up to a thickness of about 15 nm, the square (001) basal plane of[...]![]()
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Sefrioui, Zouhair ; Arias Serna, Diego ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; González Herrera, Elvira María ; Vicent López, José Luis ; Prieto, P. | American Physical Society | 2004-08-09We investigate the zero-magnetic-field dynamic scaling in Bi_(2)Sr_(2)CaCu_(2)O_(8) thin films from nonlinear currentvoltage sI-Vd characteristics and by using the concavity criterion recently proposed by Strachan et al. [Phys. Rev. Lett. 87, 06[...]![]()
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Sefrioui, Z. ; Arias, D. ; León, C. ; Santamaría Sánchez-Barriga, Jacobo ; González Herrera, Elvira María ; Vicent López, José Luis | American Physical Society | 2004-08We investigate the zero-magnetic-field dynamic scaling in Bi_2Sr_2CaCu_2O_8 thin films from nonlinear current-voltage (I-V) characteristics and by using the concavity criterion recently proposed by Strachan [Phys. Rev. Lett. 87, 067007 (2001)] .[...]